script or addon to add animation tools button in the N properties?
EDIT
Added repository. Can now be properly installed, activated and deactivated as an addon.
This script creates the desired section with other properties added.
import bpy

class anim_tools_ui(bpy.types.Panel):
    bl_space_type = &quot;VIEW_3D&quot;
    bl_region_type = &quot;UI&quot;
    bl_label = &quot;Animation Tools&quot;
    bl_idname = &quot;OBJECT_PT_le_animation_tools_ui&quot;
    
    def draw(self, context):
        layout = self.layout
        obj = context.object
        
        row = layout.row()
        row.prop(context.tool_settings, &quot;use_keyframe_insert_auto&quot;, text=&quot;&quot;)
        row.prop(context.tool_settings, &quot;keyframe_type&quot;, text=&quot;&quot;)
        row.operator(&quot;anim.keyframe_insert&quot;, text=&quot;&quot;, icon=&quot;KEY_HLT&quot;)
        row.operator(&quot;anim.keyframe_delete&quot;, text=&quot;&quot;, icon=&quot;KEY_DEHLT&quot;)
        row = layout.row()
        row.prop(context.user_preferences.edit, &quot;keyframe_new_interpolation_type&quot;, text=&quot;&quot;)
        row.prop(context.user_preferences.edit, &quot;keyframe_new_handle_type&quot;, text=&quot;&quot;)
        
        
        row = layout.row()
        row.separator()
        
        row = layout.row()
        row.label(text=&quot;Playback&quot;)
        row = layout.row()
        row.prop(context.scene, &quot;sync_mode&quot;, text=&quot;&quot;)
        row.prop(context.scene, &quot;frame_current&quot;, text=&quot;Frame&quot;)
        row.prop(context.scene.render, &quot;fps&quot;, text=&quot;FPS&quot;)
        row = layout.row()
        row.prop(context.scene, &quot;frame_start&quot;, text=&quot;Start&quot;)
        row.prop(context.scene, &quot;frame_end&quot;, text=&quot;End&quot;)
        
        
        row = layout.row()
        row.separator()
        
        row = layout.row()
        row.prop(context.scene.render, &quot;use_simplify&quot;, text=&quot;Simplify&quot;)
        row.prop(context.scene.render, &quot;simplify_subdivision&quot;, text=&quot;levels&quot;)
        
        
        

def register():
    bpy.utils.register_class(anim_tools_ui)
    
def unregister():
    bpy.utils.unregister_class(anim_tools_ui)
    
register()

It is important that after pasting the script in the text editor, the name of the text data block ends with &quot;.py&quot; and Register is checked.
Further Resources
Building a UI Panel
Conversion into an addon